Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2009 Apr 10;3:4. doi: 10.3389/neuro.06.004.2009

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2009 Koepsell, Wang, Vaingankar, Wei, Wang, Rathbun, Usrey, Hirsch and Sommer.

This is an open-access article subject to an exclusive license agreement between the authors and the Frontiers Research Foundation, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.

PMC Copyright notice

Controls for potential artifacts introduced by power line or the stimulus. (A) Example of a recording contaminated with artifacts from the power line before (bottom panel, gray trace) and after (top panel, black trace) removal of line noise (60 ± 0.1 Hz). The shapes of the EPSPs in both traces are very similar; vertical lines mark timings of spikes (red) and EPSPs (blue). The inset shows a single EPSP at higher magnification (marked by the rectangle in the main plot). (B) Phase distribution of EPSPs relative to band passed (51.5 ± 2 Hz) membrane potential (top) and to line noise (60 ± 0.1 Hz) (bottom). (C) Spectra of membrane potential (black), spikes (red) and EPSPs (blue) recorded during the presentation of a natural movie; the spectral peak is at 52 ± 2 Hz. (D) Spectra obtained from recordings of the same cell as in (A–C), but with the eyes occluded; the peak frequency is slightly lower, 48 ± 2 Hz than when the eyes were open.